Chain pipe wrench



April 26, 1927. 1,626,238

w. G. HUGHES CHAIN PIPE WRENCH Filed Dec. 17, 1925 IN V EN TOR.

ATTORNEY.

17h ot lever 17.

Patented Apr. 26, 1927.

WILLIAM G. HUGHES, or DoW'NEY GALIFORNA.

omini rien vvlRNoi.

Appueaami mea December 17, 19325. semi No. 75,971.

lily invention consists in the novel construction ot the chain and connected parts and in the relation of the chain and con nected parts to Jghe pipe when in use whereby the tool is cheap to manufacture and eilicieu't in use. y

ln the dre-Wines forming' a part ot this application Fig. l is a side elevation, partly broken, showing my Wrench positioned on on a pipe; Fig'. 2 is an 'enlarged plan of the latch portion of the chain; Fig. 3 is a section on the line 3-'3 'ot' Fig. 1; Fig. 4 isa side vieuv of a grip link; Fig. :-5 is la side view of a chain link; Figs. 6 and 7 are side views of latch links; and Fig'. 8 is a side view of a stop member.

leferrin tothe drawings, the chain' `that forms the principalportion oi my Wrench is composed of links 10 havingl holes 11 in the ends thereof in which bolts 12 are received that hold the links together to' form the' chain portion of. the Wrench.l O'n the edge of each link which contactsr livith pipe 15 are tivo lugs 14, which lugs e1`- gage ythe pipe Whenthe Wrench is in use; rllhe links at one end are connected to grip' links 15 by bolts 16;. Links 15 are connected to theelottedl head 17a of lever 17 by bolt 18, The links 10` at the other en'd are connected to latch links 19 by bolt 2'0". Links 191 on' the edge that contacts vvith the' pipe have two' lugs 2l. Vand Ain the other edge have recesses 2Q' and 28 one' of which the lock bar is receved ywhen the Wrench is positioned on a pipe. Links 19 also have handle' lugs 25 to which #thev side members Q6 of the handle are riveted. Meinbers 26" are' connected by bar 27 ivhich is gripped when the chai-n' is positioned'V on orY t en ott a pipe. Conn'ec'torfb'ars 2811i: one ond are connected bjr bolt 29 with the nose At the other end bars 2S are connected to latch links 3l `which have lugs 32 on the edge thereof which contacts 'with the pipe. Links 31 have holes 33 and 54 '.i the base thereof. A bolt 35 passes through holes 38 and through holes in the ends of the connector bars thereby hingedly connectimg` the parts. A lock member cornprisinfr side n'iernbers 36 and handle bar 37 and locl7 bar 3S and stop bar 39 is connected to links 31 bj; bolt 40 which passes through holes in side members 36' and through holes 84 of links 31. Stop bar 39 is mounted in members Bti and passes through apertures 41 in links 31. Links 31 are provided with recesses 42 in Whiclrbar 38 is received when the Wrench is positioned on a pipe. Links 31 have springs 44 t'vhic'h springsbear upon bar 38 and hold it from accidentally coming out of the recesses in links 19 and 31 when the ivrencli is positioned on a pipe. Lever 17 has 'in the outer eiid a recess 45 in which is rece' 'fed the operating cabi@ not showin ivhich recess .isclose'd by a sliding bolt 4G when the Wrench is iii use' to prevent the cable from disengagingt from the lever. Bolt 46V slides iii a bearing 47. Stop members 48 may be provided to` prevent the chain fron opening t' far when in use.

In the manufacture of the ivieiich the' chain links and latch links and links and connector bars are tiine'd preferably by stamping the Vparts out olf hea-v v shet or bar steel and the head and nose ot lever 17 is slotted coiresp'oiidirglly to alternate With the connector bars and grip links.

ln the drawings l have illustrated a' Wrench adapted for use on 'tivo sizes of pipe.V When recesses 22 and 42 are in rgiister the Wrench titsY upon the lark-fier si7'e` of pipe. lWhen recesses 23 and 42 are in register, the Wrench lits upon smaller size of pipe; Bjr' providing each of the various parts with tivo lugs on the edges which conta'ct with the pi'pe ivhen the Wrench is" in use thereon. all dang'r or" deforining` 'the pipe is avoided. Bv p'u'ttwng` in' chair-r lin-ks between the connector ba s and the'I latch links the sii/.e of the Wrench can be increased. The Wrench is used in the Well knovn manner et' using" chain' Wrenches on hC-hw" A" pl piel lt Will be seen that ivhat l terni` links', latch links, and connector bars vir lj.' comprise a chain 'of detachable parte. dev :achably secured together by the lock bars, and that one end otA the chain is secured to the nose of the operating lever and 'the other to the head ot the lever at a point below the plane that aasses through the center ot the pipe When the Wrench is positioned for use and that both oli said points of attachment are on the same side of the plane and that When a pull is exerted on the operating lever that end of the chain that is secured to the iead is forced against the pipe and becomes the -fulcrum, While the nose tightens the chain on the pipe. As the fulcrum point is below the center it can not slip back and the action of the lever on the chain is to causo leu Nfl

all parts thereof to more tightly engage the pipe at all points.

Having described my invention, l claim:

l. A chain pipe-wrench comprising a lever having a slotted head and nose, grip links rockably mounted in said head, said point ot mounting being below the center or" the pipe when the wrench is positioned for use, a chain composed ot links connected at one end to the grip links, latch links connected to the other end ot the chain, said latch links having outwardly opening recesses in their outer edges, connector bars mounted in the nose ot the lever, said point ot mounting l'ieing below the point of grip link mounting. latch links connected to the other ends of said connector bars, said last latch links having outwardly opening recesses in their outer edges and being adapted to be receiver between the latch links connected to the chain and thereby register the recesses of both sets of latch links, and a lock bar rockably mounted on one of said sets of latch links, said bar being adapted to be swung into the recesses in the latch links and lock the links together when the wrench is on a pipe.

A chain pipe-wrench comprising a lever having a slotted head and nose, a chain composed of links operatively connected at one end to vhead ot said lever below the center ot the pipe when positioned for use, said links each having two lugs on their edges which Contact with the pipe; a latch member connected to the other end of said chain; a second latch member acting in coordination with the chain latch member; means to lock said latch members against separation when the wrench is positioned on a pipe; and an operative connection between said last latch member and the nose of said lever, said last connection being below the connection to the head ot the chain.

3. A chain pipe-wrench comprising a lever having a slotted head and nose; a chain operatively connected at one end to said head below the center of the pipe when positioned for use; a latch member connected to the other end of said chain; a second latch member acting in coordination with the i'irst latch member; means to lock said latch member against separation when the wrench is positioned on a pipe; connector bars connected to said second latch member and to the nose of said lever, said last connection being below the connection to the head of the chain, each ot said members being provided on their edges which engage the pipe with a pair ot spaced lugs.

el. A chain pipe-wrench comprising a lever having slotted head and nose; grip links rockably connected to said head and entering the slots therein, said connection being below the center of the pipe when positioned :tor use; Y a chain composed ot' links operatively connected at one end to said grip links; a latch member operatively connected to the other end ot said chain, said latch member having outwardly opening recesses in its outer face; a handle connected to said latch member; a second latch member acting in coordination with the tirst latch member and having in its outer edges recesses adapted to register with the recesses of the first latch member; a locking bar rockably mounted on said last latch member, said bai` being adapted to enter recesses in both latch members when the wrench is positioned on a pipe and thereby prevent the wrench from separation from the pipe; connector bars connected to said second latch member and to the nose ot' said lever, said links each having on their edges, which contact with the pipe, two spaced lugs.

5. A chain pipe-wrench comprising a lever having a slotted head and nose, a chain composed of sections detachably connected together and having one end connected to the nose and the other end connected to the head, said points of connection being both on one side of the plane that passes through the center of the pipe when the wrench is positioned for use.

ln witness that l claim the foregoing I have hereunto subscribed my name this lith day ot December, 1925.

l/VILLIAM G. HUGHES. 

